Shaver cutter head

ABSTRACT

An improved shaver cutter head, including an outer cutter, an inner cutter mounted within the outer cutter, and means for moving the inner cutter within the outer cutter in a predetermined path of travel. Each of the cutters has a hairshearing first wall portion, the first wall portion of the mounted inner cutter being urged into engagement with the first wall portion of the outer cutter for shearing hair as the inner cutter is moved in said predetermined path of travel within the outer cutter. The outer cutter also has opposed, non-hairshearing, second and third wall portions, respectively depending from the first wall portion of the outer cutter. The second wall portion is provided with an aperture, and the third wall portion is oriented to extend in the direction of movement of the inner cutter within the outer cutter. A resilient member disposed adjacent to the outer cutter&#39;&#39;s second wall portion, extends through the aperture therein and urges the moving inner cutter into sliding engagement with the third wall portion of the outer cutter. As a result, the moving inner cutter is directly guided by the third wall portion in the aforesaid predetermined path of travel.

linite States Arpino Aug.6, 1974 SHAVER CUTTER HEAD [75] Inventor:Ronald G. Arpino, Branford, Conn.

[73] Assignee: Sperry Rand Corporation,

Bridgeport, Conn.

[22] Filed: May 24, 1973 [21] Appl. No.: 363,475

[52] US. Cl. 30/4392 [51] Int. Cl B26b 19/02, B26b 19/04 [58] Field ofSearch 30/4391, 43.92, 43.2

[56] References Cited UNITED STATES PATENTS 3,105,298 l0/l963 Carissimi30/4392 3,l9l,30() 6/1965 Locke 30/4392 Primary Examiner-Al LawrenceSmith Assistant ExaminerM. Joyce Attorney, Agent, or FirmCharles R.Miranda; Donald P. Walker [57] ABSTRACT An improved shaver cutter head,including an outer cutter, an inner cutter mounted within the outercutter, and means for moving the inner cutter within the outer cutter ina predetermined path of travel. Each of the cutters has a hair-shearingfirst wall portion, the first wall portion of the mounted inner cutterbeing urged into engagement with the first wall portion of the outercutter for shearing hair as the inner cutter is moved in saidpredetermined path of travel within the outer cutter. The outer cutteralso has opposed, nonhair-shearing, second and third wall portions,respectively depending from the first wall portion of the outer cutter.The second wall portion is provided with an aperture, and the third wallportion is oriented to extend in the direction of movement of the innercutter within the outer cutter. A resilient member disposed adjacent tothe outer cutters second wall portion, extends through the aperturetherein and urges the moving inner cutter into sliding engagement withthe third wall portion of the outer cutter. As a result, the movinginner cutter is directly guided by the third wall portion in theaforesaid predetermined path of travel.

8 Claims, 8 Drawing Figures Z5 56' 19 3 3 X5 30 :93 3 24 17 2; 31 j Z555 24 2 PAIENIEDAua 62974 SHEEY 1 OF 3 SHAVER CUTTER HEAD BACKGROUND OFTHE INVENTION This invention is concerned with means for guiding amoving inner cutter in a predetermined path of travel within an outercutter of an electric dry shaver cutter head. More particularly, theinvention is concerned with providing resilient means adapted to urgethe moving inner cutter into sliding engagement with an outer cutterwall portion which extends in the direction of said predetermined pathof travel, whereby the wall portion directly guides the moving innercutter in said predetermined path of travel.

Although the invention is generally adaptable to shaver cutter headswhich include either rotating or reciprocating inner cutters, forexemplary purposes this disclosure describes the invention in connectionwith a cutter head of the type which includes a reciprocating innercutter.

A typical cutterhead of the exemplary type includes one or more hollow,elongated, outer cutters, which are rectangular in transversecross-section, and a corresponding number of elongated inner cuttersmounted for reciprocation within the outer cutters. Each of the cuttersincludes a hair-shearing upper wall portion, spaced, non-hair-shearingside wall portions, and a lower wall portion. For hair-shearingpurposes, the upper wall portions of the cutters are slotted to providea plurality of parallel hair-shearing teeth with hair shearing edges.The hair-shearing wall portion of a given inner cutter, and particularlythe hair-shearing edges thereof, are urged, by means of a springconnected to the inner cutter, to cooperate with the hairshearing wallportion of the outer cutter, for shearing hair as the inner cutter isreciprocated within the outer cutter. The inner cutter is normallyreciprocated by means of the spring, which has a mid-portion driven by amotor mounted within the shaver, and opposite end portions connected tothe lower wall portion of the inner cutter. The motor is provided with aplurality of motor arms, each of which urges a spring and thus one ofthe inner cutter hair-shearing wall portions into engagement with anouter cutter hair-shearing wall portion, and reciprocates the innercutter several hundred times per minute.

To promote rapid assembly of inner and outer cutters, the cutters arerelatively dimensioned to allow for fitting the inner cutters andconnected springs loosely into randomly chosen outer cutters. On theother hand, a loose fitting relationship between a given inner andoutter cutter allows for unwanted transverse movement of thereciprocating inner cutter toward the side wall portions of the outercutter. Such transverse movement results in the inner cutterintermittently contacting the outer cutter side wall portions, causingnoise to be emitted by the cutter head, and causing excessive wear ofinner cutters, springs and other parts of the cutter head. To curethisproblem the moving inner cutter should be guided to ensure travelthereof in a predetermined, substantially linear path of travel.

Accordingly, an object of this invention is to provide an improvedcutter head for an electric dry shaver, including novel means fordirectly guiding a moving inner cutter in a predetermined path of travelwithin an outer cutter; and

Another object is to provide, in combination, a shaver cutter head ofthe type which includes an outer and inner cutter wherein the innercutter is mounted within the outer cutter and adapted to be moved in apredetermined path of travel therewithin, and resilient means disposedadjacent to the outer cutter and adapted to urge the moving inner cutterinto sliding engagement with a non-hair-shearing wall portion of theouter cutter which is oriented in the direction of said path of travelof the inner cutter.

SUMMARY OF THE INVENTION The invention resides in providing a shavercutter head including an outer and inner cutter and improved means fordirectly guiding the inner cutter in a predetermined path of travelwithin the outer cutter. Each of the cutters includes a first wallportion having means for shearing hair. The inner cutter is adapted tobe mounted and moved within the outer cutter, such that the first wallportion of the moving inner cutter is disposed to cooperate with thefirst wall portion of the outer cutter for shearing hair. The outercutter also has oppositely disposed, non-hair-shearing, second and thirdwall portions. The second wall portion has an aperture formed therein,and the third wall portion is oriented to extend in the direction ofsaid predetermined path of travel of the moving inner cutter. Inaddition, the cutter head includes a member disposed adjacent to theouter cutters second wall portion. The member includes resilient meansextending through the aperture in the outer cutters second wall portionfor urging the moving inner cutter into sliding engagement with theouter cutters third wall portion. Since the outer cutters third wallportion is oriented in the direction of the aforesaid predetermined pathof travel of the moving inner cutter, the second wall portion directlyguides the moving inner cutter within the outer cutter.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of theupper portion of an electric dry shaver, including an improved cutterhead in accordance with the invention;

FIG. 2 is an enlarged fragmentary cross-sectional view, in elevation, ofthe upper end portion of the shaver of FIG. 1, taken substantially alongthe line 2-2 of FIG. 1, showing an embodiment of the improved cutterhead, including a plurality of outer cutters and spacer membersrespectively mounted on a cutter head frame, the cutters and spacermembers being constructed in accordance with invention;

FIG. 3 is a partial exploded perspective view of the cutter head of FIG.2, which shows details of one of the outer cutters and spacer membersaccording to the invention, details of one of the inner cutters with aconnected spring, and the cutter head frame.

FIG. 4 is an enlarged top plan view, partially in section, of the spacermember shown in FIG. 3, the section being taken substantially along theline 44 of FIG. 5;

FIG. 5 is a side view of the spacer member shown in FIG. 4;

FIG. 6 is a cross-sectional view, in elevation, of the spacer membershown in FIG. 5, taken substantially along the line 6-6 of FIG. 5;

FIG. 7 is a fragmentary cross-sectional view, in elevation, of theimproved cutter head; and

FIG. 8 is a fragmentary cross-sectional view, in elevation, of anotherembodiment of the improved cutter head.

DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in the drawings,wherein like reference numerals designate like or corresponding partsthroughout the several views, an upper portion of an electric dry shaver10 (FIGS. 1 and 2), of the type in which the invention may be included,generally includes an upper portion of a casing 11. The casing 11includes spaced front and rear walls, respectively numbered 12 and 13,and spaced side walls 14. The walls l2, l3 and 14 define arectangularly-shaped receptacle 15 within which a cutter head 16 islocated.

The cutter head 16 includes a plurality of hollow,

elongated, stationary, skin-contacting, outer cutters 17, which arerectangular in transverse cross-section. As shown in FIGS. 2 and 3, eachof the outer cutters 17 has a hair-shearing upper wall portion 18,including oppositely disposed, parallel, marginal edges 19. In addition,each of the outer cutters 17 includes oppositely disposed,non-hair-shearing, side walls portions 20, respectively depending fromthe opposite marginal edges 19 of the upper wall portion 18. Each of theouter cutters 17 also includes an elongated base spacer 21.

The upper walls 18 (FIG. 3) of the outer cutters 17 each include tworows of a plurality of spaced, parallel, transversely extending,hair-shearing teeth 22. The teeth 22 are formed by two rows of hairreception slots 23, spaced from one another by a substantially U- shapedchannel 24 protruding inwardly of the outer cutter 17. Each of thechannels 24 includes a pair of oppositely disposed, depending,non-hair-shearing wall portions 25, respectively located intermediatethe side wall portions of the outer cutter l7, and a base wall portion26.

The opposed side wall portions 20 (FIG. 3) of the outer cutters 17respectively include an aperture 27, one of which is shown in FIG. 3.Each of the apertures 27 is located approximately midway of the sidewall portion 20 in which it is formed, but closer to the base spacer 21than to the upper wall portion 18 of the outer cutter 17. In addition,at least one of the side wall portions 20 includes a downwardlyprotruding tab 28 located adjacent to one of the ends of the base spacer21.

The outer cutter base spacers 21 (FIGS. 2 and 3) are respectivelyU-shaped in transverse cross-section and have a rectangularly-shapedaperture 29 formed therein. The apertures 29 are located approximatelymidway between the ends of the respective base spacers 21. The basespacers 21 are positioned between the lower ends of the side wallportions 20 of the respective outer cutters 17, and fixedly connectedthereto by known means, for example, as by welding, to provide each ofthe outer cutters 17 with a rigid, apertured, lower wall portion.

The cutter head 16 (FIGS. 2 and 3) also includes a plurality ofelongated, stationary, skin contacting nonhair-shearing spacer members30 (FIGS. 2 and 6). Each of the spacer members 30 has a narrow, upright,generally rectangularly-shaped, transverse section; and includes acurved upper edge 31, opposed side surfaces 32 and a lower edge 33. Atleast one of the side surfaces 32 includes an outwardly extendingcrosslug 34, and the lower edge 33 includes a plurality of equidistantlyspaced, downwardly extending, protrusions 35 (FIG. 3).

As shown in FIGS. 2 and 3, the outer cutters 17 are arranged parallel toone another and respectively spaced from the next adjacent of theirnumber by means of one of the spacer members 30. As shown in FIG. 2, theouter cutter side wall portions 20 abut with the spacer member sidesurfaces 32 next adjacent thereto, and the spacer member lugs 34 extendinto the outer cutter apertures 27 located next adjacent thereto. Asthus arranged, the outer cutters 17 and spacer members 30 are mounted ona cutter head mounting frame (FIG. 3).

As shown in FIG. 3, the cutter head mounting frame 40 includes anelongated, rectangularly-shaped, base plate 41 having a plurality oflegs 42, each provided with an aperture 43. The base plate 41 alsoincludes a plurality of spaced, parallel, rectangularly-shaped apertures44 and 45 formed therein, the apertures 44 being larger than theapertures 45. A plurality of generally U-shaped apertures 46 are alsoformed in the base plate 41. The U-shaped apertures 46 are disposed inthe form of a rectangular array (not numbered) in the base plate 41 anddimensioned to receive the outer cutter protrusions 28 for aligning eachof the outer cutter apertures 29 in registry with one of the frameapertures 44. In addition, each of the spacer member protrusions 35 isdimensioned to be inserted into one of the base plate apertures 44 or45. Upon thus assembling the outer cutters l7, spacer members 30 andframe 40, the outer cutters 17 are connected to the frame 40 by meanswell-known in the art, for example, as by means of clips 49 adapted totightly hold the ends of each of the outer cutter base spacers 21 incontact with the frame 40 (FIGS. 2 and 3).

As shown in FIGS. 2, 3 and 7, the shaver cutter head 16 also includes aplurality of hollow, elongated movable, inner cutters 50, which arerectangular in transverse cross-section. Each of the inner cutters 50has a hair-shearing upper wall portion 51, oppositely disposed,depending, side wall portions 52, and a lower wall portion 53. The upperwall portions 51 of the inner cutters 50 (FIGS. 2 and 3) each includetwo rows of a plurality of spaced, parallel, transversely extending,hair-shearing teeth 54. The teeth 54 are formed by two rows of hairreception slots 55, spaced from one another by a substantially U-shaped,inwardly protruding, channel 56. Each of the channels 56 includes a pairof oppositely disposed, depending, non-hair-shearing wall portions 57,respectively located intermediate the side wall portions 52 of the innercutter 50, and a lower wall portion 59.

Another form of inner cutter 50 is shown in FIG. 8. The inner cutter 50of FIG. 8 differs from the inner cutter 50 of FIG. 7 in that it has aninverted W-shaped transverse cross-section; the inner cutter channel 56(FIG. 8), and thus each of the opposed, depending, channel wall portions57 (FIG. 8), extends further inwardly of the inner cutter 50 than thecorresponding wall portions 57 of the inner cutter 50 of FIG. 7; and thechannels lower wall portion 59 (FIG. 8) is the inner cutters lower wallportion 53. Thus the inner cutter 50 of FIG. 8 has a lower (channel)wall portion 53 (59).

The lower wall portions 53 of the inner cutters 50 (FIGS. 3, 7 and 8)respectively include a rectangularlyshaped aperture 60 formed therein.The apertures 60 are located approximately midway between the ends ofthe respective lower wall portions 53. In addition, each of the lowerwall portions 53 includes spaced apertures 61, located on either side ofaperture 60, each near one of the opposite ends of the lower wallportion 53. The apertures 61 of the respective inner cutters 50 areadapted to have seated therein the end portions an elongated spring 63.

As shown in FIGS. 2 and 3, each of the springs 63, isrectangularly-shaped in transverse cross-section, and has a body portion64 and spaced end portions 65. Each of the body portions 64 is providedwith a partial loop 66, formed therein approximately midway between thespring end portions 65. The spring end portions 65 are dimensioned to beseated within the inner cutter apertures 61 and adapted by meanswell-known in the art to be removably connected to the inner cutterlower wall portions 53. The connected springs 63 are thus adapted to becarried by the inner cutters 50 beneath the lower wall portions 53thereof.

As shown in FIG. 2 an inner cutter 50 and connected spring 63 isremovably inserted, by means well-known in the art, into each of theouter cutters 17. In addition, the cutter head 16 is mounted within thecutter head receptacle l5 and detachably connected in place. Forexample, as shown in FIG. 2, the shaver includes a shaver motor housing70 within which a shaver motor (not shown) is disposed. The motorincludes a plurality of motor arms 72, adapted by known means (notshown) to be reciprocated by the motor (not shown). The motor arms 72respectively extend upwardly from the housing 70, and the housing 70includes a plurality of lugs 73 extending laterally therefrom. The lugs73 are dimensioned to detachably engage the apertures 43 in the legs 42of the cutter head frame 40, thereby mounting the cutter head 16 withinthe shaver casing 11.

Each of the motor arms 72 (FIG. 2) extends through the next adjacentcutter head frame aperture 44 and into one of the outer cutter baseplate apertures 29, to engage the next adjacent inner cutter spring loop66. As the motor arms 72 engage the springs 63, each of the springs 63is urged from a relaxed state to a compressed state and towards theassociated inner cutter lower wall portion 53. When the shaver motor(not shown) is operated, reciprocating motion of the motor arms 72 istransmitted to the inner cutters 50 via their connected springs 63.Concurrently, the springs 63 urge the upper hair-shearing wall portions51 of the inner cutters 50 into sliding engagement with the upperhair-shearing wall portions 18 of the outer cutters 17 for shearinghair.

When the shaver 10 (FIGS. 1 and 2) is in use, the uppermost surfaces ofthe cutter head 16, and thus the upper wall portions 18 of the outercutters 17 and the curved upper edges 31 of the spacer members 30, areplaced in contact with the users skin (not shown) and moved thereacrossfor shearing hairs (not shown). Normally the shaver 10 is moved in ahair-shearing path wherein both the outer cutter upper wall portions 18and spacer member upper edges 31 extend transversely of the path ofmovement, for example, in path directions shown by the arrows A or B(FIG. -2). As the cutter head 16 is moved across the users skin, hairswhich enter the outer cutter slots 23 are shorn by the inner cutterteeth 54 in cooperation with the outer cutter teeth 22. Concurrently,the spacer member upper edges 31 exert sufficient pressure on the usersskin to stretch the'skin in the area thereof immediately in advance ofthe path of movement of the outer cutter marginal edges 19, therebypreventing the users skin from entering the outer cutter slots 23. Inaddition, the spacer member upper edges 30 contact the hairs extendingfrom the users skin in advance of the path of movement of the outercutter marginal edges 19, and lift the hairs, by means well-known in theart, from the surface of the skin, to facilitate their entry into theouter cutter slots 23.

The inner and outer cutters, 50 and 17, as hereinbefore described, arerespectively dimensioned to have a loose fitting relationship with oneanother to allow consumers to periodically replace the inner cutters 50.As a consequence, although the inner cutters 50 are urged into slidingengagement with the upper wall portions 18 of the outer cutters 17, theinner cutters 50 are able to move toward the outer cutter wall portions20 and 25. The inner cutters 50 thus move both transverse to thedirection of travel of the inner cutters 50 within the outer cutters l7,and transverse to the direction the springs 63 urge the inner cutters 50into sliding contact with the upper wall portions 18 of the outercutters 17. Such transverse movement causes the reciprocating innercutters 50 to intermittently contact the outer cutter side wall portions20, or the channel wall portions 25, depending on the relativedimensions of the inner and outer cutters 50 and 17. As a result, thecutter head 16 tends to emit noise, and the outer cutters l7, innercutters 50, springs 63 and other parts of the cutter head 16, tend tobecome excessively worn. Accordingly, this invention is directed toproviding means for preventing the aforesaid transverse movement of thereciprocating inner cutters 50 within outer cutters 17.

To that end, as shown in FIG. 3, 7 and 8, one of the side wall portions20 of each of the outer cutters 17 is provided with at least one, andpreferably two, rectangularly-shaped, apertures 80. The apertures (FIG.2) are spaced apart from one another and located on opposite sides of,and above, the side wall apertures 27. As shown in FIG. 2, the apertures80 are located adjacent one of the side wall portions 52 of the innercutter 50, when the inner cutter hair-shearing wall portion 51 isdisposed in sliding engagement with the outer cutter hair-shearing wallportion 18.

In addition, according to the invention each of the spacer members 30(FIG. 3) is provided with at least one, and preferably two apertures 81,from which resilient means 82 extend. As shown in FIGS. 4-6, theapertures 81 are spaced from one another and have a substantiallyrectangularly-shaped configuration. The resilient means 82 includes atleast one, and preferably four, elongated, resilient arms 83,respectively designated 83A or 838 for discussion purposes todistinguish between the side surfaces 32 of the spacer member 30 fromwhich the arms 83 outwardly extend. Preferably, one of the arms 83 ofeach pair of arms 83A and 83B extends from each of the apertures 81.Each arm 83A or 83B (FIG. 3) includes a free end 84 having a protrusion85 thereon. The protrusions 85 on arms 83A and 83B are disposed in thesame spatial relationship relative to one another and to the outercutter lug 34, as the outer cutter apertures 80 are disposed relative toone another and to the outer cutter aperture 27. As a result, when theouter cutters 17 and spacer members 30 are recpectively connected to thecutter head frame 40, with the spacer member lugs 34 extending into thenext adjacent outer cutter apertures 27, the protrusions 85 on arms 83Aand 83B are disposed in registry with, and extend into, the nextadjacent outer cutter apertures 80.

As shown in FIGS. 2, 7 and 8 each of the outer cutter wall portions and25, longitudinally extends in the direction of the desired path oftravel of the reciprocating inner cutter 50 associated therewith. Inaddition, the protrusions 85 extend from the resilient arms 83A and 83Band respectively contact spaced areas of the moving inner cutter sidewall portions 52. The arms 82A and 83B, via their respective protrusions85, urge the moving inner cutters 50 toward the outer cutter wallportions 20 and 25. The inner cutters 50 are thus respectively urged ina direction which is transverse to the direction of movement of theinner cutters 50 within the outer cutters 17, and transverse to thedirection in which the springs 63 urge the inner cutters 50 to ensuresliding engagement between the cutter wall portions 51 and 18. The arms83A and 83B associated with each of the outer cutters 17 therebyresiliently urge one of the moving inner cutters 17 into slidingengagement with either an outer cutter side wall portion 20, as shown inFIG. 7, or an outer cutter channel wall portion 25, as shown in FIG. 8.Since both of the aforesaid wall portions, 20 and 25, extend in thedesired direction of movement of the inner cutter 50 associatedtherewith, both wall portions, 20 and 25, are adapted to directly guidethe associated moving inner cutter 50 in its predetermined path oftravel. In accordance with the invention the resilient means 82 thuscooperates with the inner cutter 50 and either of two non-hair shearing,depending, outer cutter wall portions, 20 or 25, i.e., either a channelwall portion or the side wall portion 20 opposite the outer cutteraperture 80, to substantially prevent side to side transverse movementof a given moving inner cutter 50 within the outer cutter 17 associatedtherewith.

As shown in FIG. 2, only one of the side wall portions 20 of each of theouter cutters 17 is provided with apertures 80. On the other hand, bothof the spacer members are provided with resilient arms 83A and 83B. As aresult, the arms 83B of both spacer members 30, and the arms 83A of theright hand spacer member 30, extend into apertures 80 in the adjacentcutter wall portions 20, whereas the arms 83A of the left hand spacermember 30 cannot extend into the centrally disposed outer cutters leftside wall portion 20. Nor is it desirable that they do so, since bothside wall portions 52 of the centrally disposed inner cutter 50 wouldthen be resiliently supported, and reciprocating movement of thecentrally disposed inner cutter 50 would not be stabilized in accordancewith the invention. Further, as shown in FIGS. 4-6, the spacer memberapertures 81, from which arms 83A and 83B extend, are dimensioned suchthat the arms 83A and 833, including the protrusions 85 thereof, can berespectively urged toward and completely within the aperture 81associated therewith. Accordingly, as shown in FIG. 2, the resilientarms 82A of the left hand spacer member 30 are disposed within theapertures 81 thereof, and do not prevent abutment of that spacer membersright side wall surface 32 with the centrally disposed outer cuttersleft side wall portion 20.

In accordance with the objects of the invention there has been describedan improved cutter head including an outer cutter and an inner cutteradapted to be reciprocated within the outer cutter by means of a spring,wherein resilient means are provided for urging the inner cutter intosliding engagement with a wall portion of the outer cutter which extendsin the direction of movement of the inner cutter within the outercutter, to prevent side to side movement of the inner cutter within theouter cutter.

Inasmuch as certain changes may be made in the above described inventionwithout departing from the spirit and scope thereof, it is intended thatall matter contained in the above description or shown in theaccompanying drawings shall be interpreted in an illustrative ratherthan limiting sense. And, it is intended that the following claims beinterpreted to cover all the generic and specific features of theinvention herein described.

What is claimed is:

1. A shaver cutter head comprising:

a. an outer cutter and an inner cutter, each of the cutters including ahair-shearing first wall portion, the inner cutter adapted to be mountedwithin the outer cutter and moved therewithin in a predetermined path oftravel, the first wall portion of the mounted inner cutter beingdisposed to cooperate with the first wall portion of the outer cutterfor shearing hair as the inner cutter is moved within the outer cutter;

b. the outer cutter including non-hair-shearing second and third wallportions, the second wall portion having an aperture formed therein andthe third wall portion extending in the direction of said predeterminedpath of travel of the inner cutter; and

c. a member disposed adjacent to the second wall portion of the outercutter, the member including resilient means extending through saidaperture in the second wall portion of the outer cutter and beingadapted to urge the moving inner cutter into sliding engagement with thethird wall portion of the outer cutter, whereby said third wall portiondirectly guides the moving inner cutter in said predetermined path oftravel.

2. The cutter head according to claim 1 including spring means connectedto the inner cutter and adapted to resiliently urge the inner cutter ina first direction transverse to the direction of said predetermined pathof travel of the moving inner cutter, and saidresilient means beingadapted to resiliently urge the moving inner cutter in a seconddirection which is transverse to both said first direction and thedirection of said predetermined path of travel.

3. The cutter head according to claim 1 wherein said aperture in thesecond wall portion of the outer cutter includes two apertures spacedapart from one another, and said resilient means includes a pair ofspaced resilient arms, one of said arms partially extending through oneof said two apertures and the other arm extending partially through theother of said two apertures, said arms slidably contacting spaced areasof the moving inner cutter and being adapted to urge the moving innercutter in a direction transverse to the direction of said predeterminedpath of travel thereof.

4. The cutter head according to claim 1, wherein said inner and outercutter respectively include an upper wall portion and said outer cutterincludes a pair of oppositely disposed side wall portions, said firstwall portions of the inner and outer cutters respectively being theupper wall portions thereof, said second wall portion of the outercutter being one of the side wall portions thereof, and said third wallportion of the outer cutter being the other side wall portion thereof.

5. The cutter head according to claim 1, wherein said outer cutterincludes a pair of oppositely disposed side wall portions, said secondwall portion of the outer cutter being one of said side wall portionsthereof, the first wall portion of the outer cutter including a channelformed inwardly of the outer cutter, said channel having a dependingnon-hair-shearing wall portion disposed between the side wall portionsof the outer cutter, and said third wall portion of the outer cutterbeing the depending wall portion of said channel.

6. The cutter head according to claim 1 including a frame upon which apair of outer cutters are mounted so as to position the first wallportions thereof in hairshearing relationship with a shaver users skinand to position the apertured second wall portions thereof opposite oneanother, said member being an outer cutter spacer member mounted on theframe between said apertured second wall portions, said resilient meansincluding spaced resilient arms, one of said arms extending into theaperture in one of said second wall portions, and the other armextending into the aperture in the other second wall portion.

7. The cutter head according to claim 1 wherein said cutter headincludes two of said outer cutters each including a side wall portion,the cutters being spaced apart from one another by said member such thatthe side wall portions thereof are disposed opposite one another, atleast one of said side wall portions being an outer cutter second wallportion, said member including opposed side walls one of which abutswith one of said opposite outer cutter side wall portions and the otherof which abuts with the other of said opposite side wall portions, saidmember having spaced apertures formed therein, said resilient meansincluding spaced resilient arms, one of said arms extending outwardlyfrom within each of said member apertures, said members arms andapertures being respectively relatively dimensioned to allow the armsextending therefrom to be urged inwardly thereof to dispose said armswithin said member, and at least one of said arms extending through theaperture in said at least one side wall.

8. The cutter head according to claim 1, wherein said outer cutter isone of a plurality thereof, said inner cutter is one of a pluralitythereof, each of said inner and outer cutters including one of saidfirst wall portions, each of said outer cutters including one of each ofsaid second and third wall portions, one of said apertures being formedin each of said second wall portions, each of said inner cutters beingadapted to be mounted within each of the outer cutters and movedtherewithin in a predetermined path of travel relative thereto, one ofsaid members being disposed adjacent to the second wall portion of eachof said outer cutters, and each of said members including resilientmeans extending therefrom and through at least one of said second wallportion apertures.

1. A shaver cutter head comprising: a. an outer cutter and an innercutter, each of the cutters including a hair-shearing first wallportion, the inner cutter adapted to be mounted within the outer cutterand moved therewithin in a predetermined path of travel, the first wallportion of the mounted inner cutter being disposed to cooperate with thefirst wall portion of the outer cutter for shearing hair as the innercutter is moved within the outer cutter; b. the outer cutter includingnon-hair-shearing second and third wall portions, the second wallportion having an aperture formed therein and the third wall portionextending in the direction of said predetermined path of travel of theinner cutter; and c. a member disposed adjacent to the second wallportion of the outer cutter, the member including resilient meansextending through said aperture in the second wall portion of the outercutter and being adapted to urge the moving inner cutter into slidingengagement with the third wall portion of the outer cutter, whereby saidthird wall portion directly guides the moving inner cutter in saidpredetermined path of travel.
 2. The cutter head according to claim 1including spring means connected to the inner cutter and adapted toresiliently urge the inner cutter in a first direction transverse to thedirection of said predetermined path of travel of the moving innercutter, and said resilient means being adapted to resiliently urge themoving inner cutTer in a second direction which is transverse to bothsaid first direction and the direction of said predetermined path oftravel.
 3. The cutter head according to claim 1 wherein said aperture inthe second wall portion of the outer cutter includes two aperturesspaced apart from one another, and said resilient means includes a pairof spaced resilient arms, one of said arms partially extending throughone of said two apertures and the other arm extending partially throughthe other of said two apertures, said arms slidably contacting spacedareas of the moving inner cutter and being adapted to urge the movinginner cutter in a direction transverse to the direction of saidpredetermined path of travel thereof.
 4. The cutter head according toclaim 1, wherein said inner and outer cutter respectively include anupper wall portion and said outer cutter includes a pair of oppositelydisposed side wall portions, said first wall portions of the inner andouter cutters respectively being the upper wall portions thereof, saidsecond wall portion of the outer cutter being one of the side wallportions thereof, and said third wall portion of the outer cutter beingthe other side wall portion thereof.
 5. The cutter head according toclaim 1, wherein said outer cutter includes a pair of oppositelydisposed side wall portions, said second wall portion of the outercutter being one of said side wall portions thereof, the first wallportion of the outer cutter including a channel formed inwardly of theouter cutter, said channel having a depending non-hair-shearing wallportion disposed between the side wall portions of the outer cutter, andsaid third wall portion of the outer cutter being the depending wallportion of said channel.
 6. The cutter head according to claim 1including a frame upon which a pair of outer cutters are mounted so asto position the first wall portions thereof in hair-shearingrelationship with a shaver user''s skin and to position the aperturedsecond wall portions thereof opposite one another, said member being anouter cutter spacer member mounted on the frame between said aperturedsecond wall portions, said resilient means including spaced resilientarms, one of said arms extending into the aperture in one of said secondwall portions, and the other arm extending into the aperture in theother second wall portion.
 7. The cutter head according to claim 1wherein said cutter head includes two of said outer cutters eachincluding a side wall portion, the cutters being spaced apart from oneanother by said member such that the side wall portions thereof aredisposed opposite one another, at least one of said side wall portionsbeing an outer cutter second wall portion, said member including opposedside walls one of which abuts with one of said opposite outer cutterside wall portions and the other of which abuts with the other of saidopposite side wall portions, said member having spaced apertures formedtherein, said resilient means including spaced resilient arms, one ofsaid arms extending outwardly from within each of said member apertures,said member''s arms and apertures being respectively relativelydimensioned to allow the arms extending therefrom to be urged inwardlythereof to dispose said arms within said member, and at least one ofsaid arms extending through the aperture in said at least one side wall.8. The cutter head according to claim 1, wherein said outer cutter isone of a plurality thereof, said inner cutter is one of a pluralitythereof, each of said inner and outer cutters including one of saidfirst wall portions, each of said outer cutters including one of each ofsaid second and third wall portions, one of said apertures being formedin each of said second wall portions, each of said inner cutters beingadapted to be mounted within each of the outer cutters and movedtherewithin in a predetermined path of travel relative thereto, one ofsaid members being disposed adjacent to the second wall portion of eachof said outer Cutters, and each of said members including resilientmeans extending therefrom and through at least one of said second wallportion apertures.